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THE NUCLEAR CYTOLOGY OF SIROGONIUM 1 , 2
Author(s) -
Wells Charles V.,
Hoshaw Robert W.
Publication year - 1971
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1111/j.1529-8817.1971.tb01518.x
Subject(s) - nucleolus , biology , interphase , mitosis , metaphase , nucleolus organizer region , chromosome , microbiology and biotechnology , genetics , cell nucleus , ploidy , cytology , nucleus , gene
SUMMARY The nuclear cytology of 9 strains of Sirogonium is described. The interphase nucleus contains 1–3 nucleoli, a nucleolar‐organizing track, and many (>100) chromocenters. During the division cycle the nucleoli are transformed into a nucleolar substance which becomes associated with the chromosome and is transported through mitosis on the chromosomes. All strains possess minute dot chromosomes varying in length at metaphase from 0.5 to 1.5 μ; satellite chromosomes are 2.5–3.5 μ long. The number of chromosomes varies from 48 ± 2 to 100 ± 2. No evidence of centromeric activity was observed.